Electric covering for indicating abnormal conditions



(No Model.)

G. J. JEWILL.

ELECTRIC COVERING FOR INDIGATING ABNORMAL CONDITIONS.

No. 362,010. Patented Apr. 26, 1887.

WITNESSES UNITED STATES PATENT OFFICE.

GEORGE JOHNJEWILL, OF PHILADELPHIA, PENNSYLVANIAL ELECTRIC COVERING FORlNDICATING ABNORMAL CONDITIONS.

SPECIFICATION forming; part of Letters Patent No. 362,010, dated April26, 1887.

Application filed December 24, 1884. Serial No. 151,104. (1Z0 model.)

To all whom it may concern:

Be it known that I, GEORGE JOHN J EWILL, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inElectric Coverings for Indicating Abnormal Conditions; and I do declarethe following to be a full, clear, and exact description of theinvention, such as. will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters and figures of referencemarked thereon, which form a part of this specification.

Figure 1 represents the fabric as it is first made. Fig. 2 representsthe fabric after it is disposed in place. Fig. 3 is a section in line 40w.

This invention relates to improvements in.

means forrendering structures ofvarious kinds secure from danger arisingfrom abnormal conditionssuch as fire, water, or burglars-w-hichinjuriously affect the structure or its contents.

wires beconiing part of the same, as shown in Fig. 1. 1 The wires may beincorporated in other ways, such as laying the wires in a series side byside between two pieces of fabric, and thensecuring the whole by pasteor othwise; but I prefer the first method. The fabric thus formed is cutinto lengths suitable for use, say, for flooring of a room or theceiling. The fabric thus cut is put in place like strips of wall-paper,arranged in one direction of the room, forming a covering, 0. Theprotruding ends a a, &c., are soldered together in loops, and form onecontinuous wire. Then a sheet of thin paper, B, is placed on thiscovering of wire fabric. Over this sheet of paper B isplacedanothercovering, D, of the wire fabric,

this being disposed so that its wires a run transverse the wires a ofthe first covering, C. The ends 0 c, &c., of this second covering aresoldered together, forming a continuous wire through this secondcovering. Then this continuous wire is connected at one endsay cwith theother continuous wire in the first layer through a resistance-coil, sayat f. Then one of the layer-wires is grounded, as at c, and the other isconnected with the line-wire g, which runs to the battery, and has agalvanometer connected therewith. This covers the floor with a mesh ornet-work of wire which is in circuit.

Now, should any accident happen to the wiresay 'it is cut forburglarious purposes, or by fire-the circuit is broken, thegalvanometer-needle falls open, and an alarm is given. Should any onewalk across the room, or pressure be applied so as to press one seriesof wires upon the others, immediately the current is short-circuited,the resistance-coil is cut out, and the galvanometer-needle gains itsposition in the angle, and the alarm is also given. Should water byanymishap flow in, the two series will contact and also short-circuit. Itis therefore obvious that whether the wire fabric be cut or contacted inany way an alarm will be sounded.

It is obvious that the two coverings of wire fabrics need not be placedso that the wires are at right angles, but simply so that they shallcross one another at any angle.

This fabric is to be used with any structuresuch as a house, a safe, atrunk, &c.-by simply putting it in place, as above described.

In Fig. 4 is shown diagrammatically another way to use the fabric,especially to indicate leakage of water. Here only a single thickness isusedsay on the ceiling. Instead of looping the ends, as described, thealternate ends at m of the wires on each side are connected with thewires 1) g, which connect with the battery 8 and gong t. This forms anopen circuit in the covering. Now, if water should leak in, a connectionis made at some point, the circuit is closed, and the alarm sounded.

Where this fabric is designed for use in places where the alarm wouldonly be sounded by breaking the wires, these may be covered beforeinserting them in the fabric; but I prefer paper or analogous bibuloussubstance, the series of wire in one layer crossing those in the other,as set forth.

3. As a new article of manufacture, a fabric to be used on structures torender an alarmin case of abnormal conditions, consisting of a woven orlike material containing a series of wires formed therewith, as setforth.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE JOHN JEXVILL.

'Witnesses:

J. II. Arrnnnson, O. 13. Ronnu'rs.

